Book rest or table.



Patented Apr. 3., |900.

w. H.l JAcKsoN. 300K REST 0R TABLE.

(Application led Jan. 24, 1900,)

(un Mddel.)

Illlllllllllll UNITED STATES PATENT OFFICE.

WILLIAM H. JACKSON, OF WATERBURY, CONNECTICUT.

BOOK REST OR TABLE.

SPECIFICATION forming part f Letters Patent NO. 646,835, dated April 3,1900.

Application filed January 24, 1900. Serial No. 2,693. (No model.)

To all whom, it may concern: I

Be it known that I, WILLIAM H. JACKSON, of Waterbury, in the county ofNew Haven and State of Connecticut, have invented a new Improvement inBook Rests or Tables; and I do hereby declare the following, when takenin connection with the accompanying drawings and the letters ofreference marked thereon, to be a full, clear, and exact description ofthe same, and which said drawings constitute part of this specification,and represent,

in I

Figure l, a perspective View of a support constructed in accordance withmy invention; Fig. 2, a broken vertical section of a portion of thepost, rod, arm, and brace.

This inventionrelates to an improvement in book rests or tables, andwhile adapted for attachment to the arm of a chair it is equallyapplicable for attachment to beds or other places where an adjustablebook rest or table is desired, the object of the invention being asimple construction and arrangement of parts, which may be readilyapplied and removed and which permits a great range of adjustment; andthe invention consists in the construction as hereinafter described, andparticularly recited in the claims.

The device proper is supported in a plate A, adapted to be secured tothe arm of a chair either by screws extending through `the plate or by aclamp B, as shown. In the top of the plate is a longitudinal undercutgroove C, into which ablockD may pass. On this block and extendingupward through the groove C is a tubular post E, formed in one side witha longitudinal slot e. Into the'top of this post is inserted a rod F,which is adapted to be clamped to the post in any desired -manner. Asherein shown, the rod is formed in one side, near its lower end, with athreaded opening f, adapted to receive a thumb-screw G,which passesthrough a plate H and through the slot e, the plate H being wider thanthe slot, so as to bear on the opposite sides thereof and clamp the rodto the post when the screw is tightened. Over the upper end of the postis placed a collar I, which rests upon the upper end of the plate H. Theupper end of the rod F is formed with a recess F to receive a pin J,depending from a head J', and in this pin is an annular groove J 2, intowhich a set-screw J extends, and whereby the pin may be simply heldagainst vertical movement or clamped in the upper end of the rod. To thehead J an arm K is pivotally connected, and ron this arm is a collar L,which is connected with the collar I by a brace M, the connectionpreferably being by set-screws N, whereby the brace may be firmlyclamped between the collars and the collars clamped, respectively, onthe post and arm. Also mounted on the arm K is a slide O, which is heldagainst rotation either by a set-screw or by making the end of the armangular and the slide O of corresponding shape. On the slide is avertical stud P, over which a socket Q sets, which is adapted to beclamped thereto, and at the upper end of the socket is a disk R, whichis adapted to be clamped to a disk S, depending from a plate T, to whicha bookholding rack, table, or other device may be attached.V Thebook-rest may therefore be turned or tilted to the desired angle. It iselevated by disengaging the clamp between the post E and the rod F andraising the rod to the desired degree. In thus lifting the rod thecollar I is also raised, so that the relative position of the brace withthe arm is maintained. If it is desired to have the arm K stand at anangle, the collar L may be moved on the arm either toward or from therod F, so as to raise or lower the outer end of the arm, and the arm maybe turned horizontally, as the head J freely turns in the upper end ofthe rod F, and the collar I is free to turn on the post E. When notrequired, the device may be removed from the plate A or that plate withthe device disengaged from the arm of the chair. y

It will thus be seen that the device is readily applied and removed andis adapted to be adjusted to almost any position desired, and when notrequired for use may be detached and the parts separated, so as tooccupy but a little space, which is also a great consideration inpacking them for shipment.

It is evident that the means for holding the parts in their variouspositions of adjustment may be changed, and I therefore do not wish tobe understood as limiting the invention to the exact details ofconstruction shown; but,

Having fully described my invention, what IOO 2. An adjustable supportcomprising a plate, having an undercut groove, a block in said grooveand supporting a Vertical tubular post formed with a longitudinal slot,a rod adapted to enter the upper end of said post, a screw, a platethrough which the screw extends into the post, the said plateoverlapping the sides of the slot inthe post, whereby the rod may beclamped to the post, a head swiveled in the upper end of said rod andadapted to be clamped thereto, an arm pivotally connected with saidhead, a collar surrounding said post above the clamping-plate thereon, acollar on said arm, a brace connectingsaid collars and adapted to beclamped thereto, a slide on said rod, and a support adapted to beadjustably connected with said slide, substantially as described.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

VILLIAM II. JACKSON.

Titnessesz W. F. HAssELBAcH, JEREMIAH F. DONOVAN.

